Croydon Crown Court heard Ogunsola subjected the girl to three years of terror, telling her to wear skirts with no underwear so it was easier to have sex with her.

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Prosecutor Hanna Llewellyn-Waters told how the girl was intimidated into thinking no-one would believe her story against a teacher. When the pupil told Nigerian-born Ogunsola she wanted a boyfriend he "ripped off her clothes and raped her again".

But it is not the first time Ogunsola has been in court for sexually harrassing a student. In 2008, he grabbed a 14-year-old pupil and stuck his tongue in her mouth while they were in his school office.

"He pulled me close and put his tongue in my mouth. He was holding my wrists."

He also asked girls in his chemistry class whether they had performed oral sex.

The court heard he had already been warned by the school's headteacher about his conduct with female students before the assaults took place. Ogunsola was cleared of two sexual assaults at that school in 2000 and another sexual assault at a different school in 2006.

Despite this, he was spared jail because of his "weak heart".

Ogunsola was told by the presiding judge: "You are going to prison for a very long time."